Pneumatic feeder.



E. M. BASSLER.

PNEUMATIC FEEDER.

APPLICATION FILED JULY24,1908.

- Patented Aug. 3, 1909. Y

2 SHBETSSHBET 2.

To all whom 'it may concern.'

v io

Y f 'unire srafrs s-iearsnr cierren.

EDWIN M. BASSLER, OF CHICAGO, ILLINOIS, ASSIGNOR 'IO C. VAN DEVENTER et COMPANY,

OFl CHICAGO, ILLINOIS, A OORPORATION OF ILLIN fno. 930,127.

OLS.

PNEUMATIC FEEDER.

Patented Aug. 3, 1909.

Application filed July 24, 1908. 3 Serial No. 445,236.

v .Be it knownthat I, EDWIN M. BAssLEi-,a citizen of the United States, and a residentpf Chicago, in the county of Cook and State of Illinois, have invented certain new and use-` ful Improvements in Pneumatic Feeders, of which the following is a specification.

This invention relates to devices for fecding pulverized material and relates particularly to pneumatic feeders especially depted for feeding pulverizcd signed and ada coal, coke, sawdust, shavings, gram and the like, of the general type shown and de` scribed in U. S. Letters Patent No. 724,780, dated April 7 1903.

feeders ofthis general type in certain important particulars; to preventthe same from l 1 becoming,` choked and clogged and thus to render them more uniform and certain in 'their operation; and-to provide for eifectf ively diffusing` the ulverized material at the point of use, as Wit iin a furnace,'the fire box of a boiler or in a kiln; whereby a commerl cially practical apparatus for the designed purpose is provided..

To effect these Objects, my invention consists of the-various features, combinations of features and details of construction herrinafter describedand claimed.

In the accompanying dra-wings, in which my invention is fully illustratedFigul-e 1 is F a vertical, longitudinal, sectional vieu' ol' a feeder of my invention. Fig. 2 is a plan sec tion taken substantiall r on the line 2-2 of j Fig. 1, en an enlarged scale. Fig'. 3 is a secl tional elevation, on an enlarge-d scale, on the line 3-3 of Fig. l, Fig. 4 is a front end l view of the mouth-'piece or nozzle at the end S of the discharge pipe from the feeder; and Fig, 5 is a rear end view of said mouth-piece.

My improved feeder comprises a suitable g-receptacle, as a hopper 1, for containing the material te be fed thereby, as pulverized coal or the like. The lower end of the hopper 1 is closed by a plate 2 and communicates by i means of a lateral opening' 3, with a discharge .line or passageway 4, which conducts to'thc point of use, as a boiler furnace, kiln or the l ike, not shown.

The pulverized material contained in the hopper 1, as coal, or the like., is adapted to be l discharged therefrom' into the flue or passageway i by jets of fluid under pressure, l

f' ol' the feeding jets and ol' the leed to the full capacity ofthe feeder.

l preferably air, directed along the bottom of the hopper 1 from nozzles or jet orifices 5, 51, 52, 53 and 51. As shown, the nozzles or jet orifices 5, 51, 511 and 5" form the discharge openings from pnssag'eu'ays 6, 61, 62, 6 and 61, the opposite ends oi' which communicate by means ol ports 7, 71, 72, T3 and 71 with a pipe S which, in turn, communicates Witha source of supply of fluid under pressure, as a `fan or blower, not shown.

The `passageufays (5, G1, 62, 63 and 61 are formed by suitable plates 9, 91, 92, 93 and 91,

and 10, 101, 101, 1011 and 1.04, which preferably extend transversely entirely across the lower f end of 'the hopper 1, the lowermost plate 9 terminatilnr substantiall T on a line-With the openiugjr 3 and the others at successively greater distances therefrom, se that the nozzles or jet orifices 5, 51, 52, 53 and 54 will form a series extendingr from said opening 3 rearwardly.

To provide for a fine control or regulation of the blast from said nozzles or jet orifices 5, 51, 52, 53 and 51 and thus of the feed, they comprise nozzles graduated inv size, the bot tom nozzle or jet orifice,V 5, being the smallest and the upper nozzles or jet orifices larger, a desirable graduation being from about at the bottom to about '1 at the top. In

` order to avoid undue contraction of the pas- I sageways hav1ngr the small Jet orliicos, said passageways are mad e of the same width as the others and the nozzles contracted by bending doxvn the cud ofthe lower plates, as shown' at 115. v

The ports7, 71, 72, 7" and Tfvue formed in the rearward end of the late 2, which is fiat, and are controlled )y a damper 11 adapted to slide in ,suitable guideways formed in the side valls of the fluid pressure pipe 8 so as to be movable to. open and close sald ports successively and in series, thus providing for the linesi possible adjustment from zero, p As shown, the damper 11 is adapted to be. operated by means of a pinion 12 mounted on a shaft 13,

j mounted in suitable bearings in theside Walls of the fluid pressure pipe 8, and engaging a rack 14 on the damper 11. Rotationis adapted to be imparted to the shaft 13 ,by means of a hand wheel 15, or the like, se` cured to an end thereof projecting through the side of the pipe 8.

i To prevent the'r ulverizedmaterial from i i falling'by ravityl. rom ther-ho per into the '2 of the hopper l1 is preferably extendedl A' through the opening 3, the endthereof be cated approximately bythe. dotted line 17,

discharge ue or passage 4,' the. ottorn plate o furnish the necessary amount ofair 'to effect combustionof the pulverized fueland also 'a better vehicle therefor to thel point of use, the flue or passageway 4 communicates with a pipe 18, which communicates rwith a source of supply of 'air under pressure, not

shown. As shown', said pipe 1-8 forms a continuation of the lluid pressure pipe 8,'said unitary structure fluid pressure pipeS and said discharge pipe 4merging into said discharge pipe 18 .at a eyond the hopper 1..

'and fluid pressure (pipe 8 form substantially a ivided by the hopper bottom 2 and a'partition 19, extending fromthe end ofthe hopper bottom to form said flue'or vpassage, way 4' Vand a' continuation of the pipe 8; At a point a distance from Athe opening 3, the partition 19 terminates and said flue or lco ' fluid i 45 passageway 4 and said air assage merge into the d1scharge pipe 18. T e quantity of air enteringl said p1pe 18 directly from the pipe 8 may be regulated as desired by means of a damper 20, which, as regards its construction and operation, is substantially a du licate of the dam er 11, heretofore describe( and will" be readi y understood by reference thereto. To prevent bridging of the pulverized materialA in the hopper 1, I provide a pipe 21,V

which, as shown, extends u ward from .the ressure pipe 8 into t 1e`lower end of said iopper to a point substantially even with the top of the hole or opening The blast of air from said pi e 21 will operate to break down the materia in the receptacle 1 and thus to revent bridging thereof, or, in' case it s Quid become bridgeih will break down the bridge as soon as said blast or jet isturned on. As shown, said pipe 21 is provided Ywith a gate valve 22, designed to be keptl normally closed and to be opened only in case a bridge forms. My invention, however, contemplatesy equally the omission of said-gate valve 22, whereby said.

' sedia? f material fromentering the same, which .might clog and obstruct the same and thus render it ineffective Vfor its designed purpose. To provide fordiz'i'using the-blast and thus tlierfiam'eand'- heat from my improved feeder lat the point of use, a suitable nozzle is provided' at the end ofythedischarge pipe 18. Asshown", said nozzle .consists of a flared mouth-piece v23 formed at the end of a pipe section 24 adapted to fit closely into the e'nd of the discharge pipe 1S,v said ipe section 24 being preferably of sufficient` ength to provide for adjusting said nozzle lengthwise,`a

desirable adjustment for ordinary pur oses being about one foot. Secured in t e flared mouth-piece 23 of said.l nozzle with its small end inwardly, is a cone 25. Preferably, also, means are provided in connection with said discharge nozzle for im arting to the blast therefrom a spiral or wiirlin'g motion. As shown, this is effected by means of vaines 26 on the interior of said nozzle, which oomprise inclined or curved end ortions 27 lat the discharge end ofsaid nozz e. As shown, also, said venes 26 provide means for supL porting the cone 25..

My invention contenu lates any desired 'or approved means for effecting longitudinal adjustment of said nozzle. As shown, said means com rise a screw threaded rod 28 connected to t e rear end of the pi e section 24. Said rod 28 extends rearward y from said nozzle, beingv preferably in airialalinement therewith, .and projectsI through a hole in the side of the discharge pipe 18 and threaded to the end ofsaid' rod outside of said pipe 18 is'a nut-29, said nut being preferably made in the to provide for con formof a-fhand whe venientl'y operatingthe same.

1. In a device for terial, a suitable receptacle, a pipe adapted foi-,connection with a source of supply of fluid under pressure and a discharge flue yfrom said receptacle, said feeding device being provided with passageways communifeeding pulverized ma' eating with said fluid pressure pipe and leading into said receptacle land terminating in jet orifices directed across said receptacle adjacent to the bottom thereof into the opening to the discharge flue, and means for ,breaking down the'material in m receptacle to prevent bridging, thereof, said means consisting'of a j et of fluid under pressure directed into said receptacle above the j et orifices for feeding the material from said receptacle into said discharge flue.

2. In a device for feeding pulverized material, a suitable receptacle, a pipe adapted for connection with av source of supply of iiuid'under pressure and a discharge flue from said receptacle, said feeding device being provided with assageways ,communicating with said iiui pressure'pipe and leadging into/said receptacle and terminating in |ijet oriiices directed across said receptacle adjacent to the bottom thereof into the openling to the discharge flue, and means` for breaking down the material in said recep- U tacle to prevent "bridging thereof, said f means consisting'cf a g sure directed npward Y of saidreceptacle.

' terial,y a suitable receptacle,

stof fluid under presy into the lower end '3. ln a device for feeding pulverized ina a pipe adapted -for-connection With a source of supply of fluid under pressure and a discharge flue from-said receptacle, saidfeeding device being provided with passageways communicatingwith said fluid pressure pipe and leadying into ysaid receptacle and terminating in l jet A'oriiices directed across said receptacle adjacent to the bottom thereof in to the o ening to the discharge Hue, means for brea ing tacle to premeans condoWn the material in said rece vent bridging thereof, sai

- sisting ofa jet of fluid under pressure directing provided Wit vfor connection-With a source o from said receptacle, said feeding device bepassagewa s communieating with said'pipe and lea ing into said receptacle and terminating in jet ori'ces directed across said receptacle adjacent to the bottom thereof into theopening to the discharge flue, said discharge ilue and iluid pressure pipe merginginto a common dis- 'charge pipe. j

5. In a device for feeding pulverized inat'erial, a suitable receptacle, a pifpe adapted supply of. fluid under pressure, and a discharge flue` from said receptacle, said feeding device being provided with passageWays communieating withv saidv pipe and leading into said receptacle and terminatingdn jet orifices directed across said receptacle adjacent to the bottom thereof into the opening to the discharge fiue, said dischargeflue and iiuid pressure pipe lmerging into a common discharge pipe, a damper which controls the ports between said iluid pressure pipeand the passageways leading into said receptacle and a damper which controls said fluid pressure pipe at a point between the said ports Vand the point at which saidvfiuid pressure pipe and discharge iiue'merge 6. The combination ivith the discharge pipe of a device for feeding pulverized material by means of a fluid blast, of means for diffusing the blasty from said discharge pipe, said means'consistingof a flared mouth-piece pipe of a device for feeding l A supply"`cf fluid/under pressure, and a discharge liucv discharge pipe.

at the end of said discharge pipe, a cone secured Within said flared mouth-piece with its apex disposed inwardly, and vane-sin said flared mouth-piece, said varies being inclined to a plane or planes through the axis of said mouth-piece.

7. The combination with the discharge pipe of a device for feeding pulverized ma terial by means of a fluid blast, of means for diffusing the blast from said pipe, said means consisting of a pipe section adapted to telescope in the end of said discharge pipe, a flared mouth-piece at the end of said pipe section, a cone secured within said flared mouth-piece with its apex disposed inwardly, and vanes in said flared mouthpiece, said vanes being inclined to a plane or planes through the axis of said mouth-piece and means for adjusting said pipe section lengthwise' relatively to said discharge pipe.

8. The combination with the discharge pulverized material by means of a fluid blast, of means for diffusing the blast from said discharge pipe,

said means consisting of a pipe section adapte in the end of said discliarge. pipe, and a ared mouth-piece at the end of ed to telesco said ipe section, a cone secured Within said dared inwardly, and varies in said ared mouthpiece, said varies being inclined to a plane or planes through the axis of said mouth-piece and means for adjusting said telescoping pipe section lenvthwise within said discharge ipe,

`riiouth-piece With its a eX disposed said means comprisin ascreW-threade rd connectedcto said te esco ing 'pipe 'section and which projects throng the Wall of said discharge pipe, anda nut threaded to the projecting end of 9. in a fe'edingdevice' of the type comprising a receptacle, a discharge flue therefrom, means for delivering material from said receptacle into said discharge flue and a said rod outside of said ics I pipe adapted for connection with a source of supply of I'luid under pressure with which said discharge flue communicates, of means for breaking down the material contained in said receptacle to prevent Ubridging thereof,. said ineens consisting of a jet of iiuid under pressure directed into'said receptacle `above the means for feeding the material from said receptacle into said'discharge due,

10. ina feedin device of the type comrising a receptac e, a ldiscl'iarge i'iiie` thererom, means for delivering material from said receptacle into vsaid discharge flue and a pipe adapted for connection with a source of su ply of fluid under pressure with which said discharge iiue communicates, of means for vpressure directed into said receptacle above of said'reeeptac e.

the "Ineens fer feecif the materiel-fiom said receptacle into sai' discharge ue, said i1. In feedin fram, means- -for delivering material fxfqin said reeeptnele'into seid discharge lue'zmd a pipe adapted fer onneetionwith a source ,ofesupply ojuid under ypressure with which said discharge' ue cjlrgiunicates, of means for breakingdown th ;mteria1 ontained in -saigireceptacle ,tdpreve'b bridging theredeviceo the typecoinlprising a reeeptac e, .la `l discharge Hue theme,

of, said *,Inean-xsk consisting. of a fet of fluid 15 underkressurezdirbted into sai receptal' above the means-for feeding the 'rc'mterisll from said rece tacle into said discharge'ue, `and 'a'valve W 'ch controls said jet. l'

In testimony,that I laim th foregoingas 20 my invention, 'I aflx my signature 1n presi enceof two subscribingwitnesses this 18th f dey ofJuly, A; D. 1908.

EDWIN BASSLEIL, Witnesses: s

t M. MLMGGRATHL f Ki-A-QRELLG-i'" 

